Control Circuit Inspection

■ Check waveform 

1. IG "OFF".
2. Connect the probe to High/Low side of the injector circuit and select the oscilloscope in the menu.
3. ENG "ON".
4. Check the waveform between High/Low side terminal of the injector circuit and chassis ground.

   Specification:  refer to SIGNAL WAVEFORM & DATA 

   Fig 1: Checking Waveform Between High/Low Side Terminal Of Injector Circuit And Chassis Ground

   Courtesy of HYUNDAI MOTOR AMERICA
5. Is the measured waveform within specification?

   YES 

   • Go to "COMPONENT INSPECTION " as follows.

   NO 

   • In case of abnormal waveform presented in High side line, repair short to battery circuit between IDB and High side line of the injector circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
   • In case of abnormal waveform presented in Low side line, repair short to battery circuit between IDB and Low side line of the injector circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.